Molding-machine platen arm



March 6, 1928. 4

E. J. BYERLEIN HOLDING' MACHINE PLATEN ARM Filed Aug. 2o. 192s 1Patented Mar. 6, 1928.

Y' RLEJ. BYERLEIN, or WAUWATosAQwI'sCoNsIN.

MOLDING-MACHINE PLATEN ARM.

Application vtiled August 20, 1926. Serial No. 130,436.4

This invention relates to improvements in molding machine platen arms,and more particularly to swinging platen arms.

It is one of the objects of the present invention to provide a platenarm arranged to be supported independently of the hinge nn. v l Afurther object of the invention is to provide a molding machine with aswinging platen arm in which the arm has a finished surface at the topto engagea like finished surface on the frame so that when pressure isexerted on the arm it will be squared up by the finished surface contactand insure a rigid and parallel platen irrespective of wear on thehinge, and likewise insures an even pressure on a mold held by themachine.

A further object of the invention is to provide a swinging platen armwhich is of very simple construction, is inexpensive to manufacture, isstrong and durable, and is well adapted for the purposes described.

With the above and other objects in view Vthe invention consists of theimproved platen arm for molding machines and its part-s andcombina-tions as set forth `in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference charactersindicate the same parts in both of the views :v

Fig. 1 is a side view of a moldingr machine having the improved platenarm; and

Fig. 2 is a detail' sectional view taken on line 2-2 of F ig. 1 and on alarger scale.

Referring now more particularly to the drawing it will appear that thenumeral 5 indicates a molding machine of the type in which the Hask isreciprocated to cause the sand to be packed and squeezed by contact witha platen 6.

The machine is formed with an upwardly extending ortion 7 which iscurved at its upper portion, as at 8. A hinge portion 9 is formedthereadjacent to receive the hinge end portion 10 of a platen arm 11,the portion l0 being bored to receive a pin by which means it isconnected to the frame hinge portion 9. n

The free end portion of the platen arm is provided with an internallythreaded bore into which is threaded ascrew 12 which carries at itslower end the pla-ten 6 and by operative full line position and when sopositioned it is accommodatedby the curved portion Sof the frame. Theupper edge of the platen arm is formed with a projecting portion 13having a finished surface to engage a similar finished surface 14provided on the under edge of the frame portion 8L Obviously, the platenarm may be swung `to an out of the way position topermit ready access tothe flask and patterns. However, whenthe arm is in the normal positionfor operation a squared position will always be assured due to theengagement of the arm portion 13 with the frame. This will result in arigid, parallel platen and wear on the hinge will not affect itsposition.

From the foregoing description it will be seen that the improvedmoldingmachine with the swinging platen arm is of very simple and novelconstruction, and is well adapted for the purpose set forth.

What I claim as my invention is:

1. In a. molding machine, the combination with the frame, of a platenarm hingedly connected to the upper portion of the frame and movablefrom an inoperative position to an operative position in bracing contactwith the frame, the bracingv contact being me- `dia-lly of the ends ofthe platen arm.

2. In a molding machine, a frame formed with a finished bearing surfaceon the under edge thereof, and a platen arm hingedly mounted in theframe, said platen arm hav-y ing a finished bearing surface on its upperedge medially of its ends for engagement with the frame bearing surfacein one position of the arm.

3. In a'molding machine, av frame having a curved outwardly off-setupper end portion, a portion of said frame adjacent said curved portionhaving ak finished bearingsurface, a platen arm hingedly mounted in theframe and movable into said curved portion of the frame,.said arm havingafinished bearing surface to engage the frame bearing surface to bracethe arm affainst vertical strain, said bearing surfaces bbeing eov incontact in onlylone position of theV arm.

4. In a. molding machine, the combination with :L frame, of a platen ermhingedly connected to the upper portion of the frame and movable from aninoperative position to an 5 operative position in bracing Contact Withthe frame, and n platen carried by the arm, the bracing contact being atay point distant from the hinged connection but at n distance less thanthe distance between the hinged connection and the platen carried bywtbe10 arm.

In testimony whereof, I aflx my signatui-e.

ERLE J. BYERLEIN.

